Related Clues:
- Hazardous flying weather
- Low-lying clouds
- ___ machine (stage effect maker)
- Low-visibility condition
- Problem for a mariner
- Bafflement
- Something a lighthouse beacon cuts through
- Typical London weather
- Driving visibility problem
- Common San Francisco forecast
- Vision obscurer outdoors
- Obstacle to visibility
- Hazard for takeoffs and landings
- It 'comes on little cat feet,' per Carl Sandburg
- Low-visibility forecast